Intelligent carbon source enrichment hydrolysis device and operation method thereof

Abstract

The application provides an intelligent carbon source enrichment hydrolysis device and a running method thereof. The device comprises a rapid reaction tank, which is provided with a water inlet main pipe, a reagent adding pipe, a stirrer and an intelligent control module; a carbon source enrichment hydrolysis pool, which is connected with the water outlet end of the rapid reaction tank and is provided with a water outlet assembly at the bottom of the side wall; the carbon source enrichment hydrolysis pool is internally provided with a filter material expansion zone, a filter layer zone and a water distribution chamber from top to bottom; the filter layer zone is internally filled with a filler, and the filler is hung with a biological membrane; and a backwashing device, which is arranged on the carbon source enrichment hydrolysis pool and is used for making sewage in the filter material expansion zone enter the water distribution chamber and the filter layer zone, so that small-molecule organic matters after hydrolysis on the biological membrane are fully mixed with the sewage. The application mainly aims at improving the nitrogen removal effect of low C / N sewage, can realize the enrichment of raw water organic carbon source, improves the biodegradability of the carbon source, and is suitable for efficient nitrogen and phosphorus removal of low C / N sewage in most regions.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, and in particular to an intelligent carbon source enrichment and hydrolysis device and its operation method. Background Technology

[0002] The statements in this section are merely background information relating to this disclosure and do not necessarily constitute prior art.

[0003] Currently, the influent to most urban wastewater treatment plants is a mixture of domestic sewage and pre-treated industrial wastewater. Some plants primarily treat wastewater from industrial parks and domestic sewage within their areas, with industrial wastewater accounting for over 50% of the effluent in some plants. Industrial wastewater has a wide range of sources, complex composition, and significant variations in quality. After pretreatment, the water entering wastewater treatment plants often exhibits low biodegradability, which significantly impacts the treatment efficiency and stability of the plants. For wastewater with low carbon sources and poor biodegradability discharged into urban wastewater treatment plants, carbon sources can be enriched in the original wastewater. Anaerobic hydrolysis can then convert the enriched macromolecular organic carbon sources into smaller molecular organic carbon sources, improving the biodegradability of the wastewater and providing a high-quality carbon source for the subsequent denitrification stage. However, low C / N wastewater has complex water quality and large flow variations. Although carbon source hydrolysis and enrichment can significantly increase the content of small molecule organic matter in wastewater, changes in influent flow and hydrolysis time can also affect the carbon source enrichment concentration, which may result in the carbon source after hydrolysis and enrichment failing to meet the requirements of subsequent biological treatment, thus affecting the nitrogen and phosphorus removal effect. Summary of the Invention

[0004] This invention proposes an intelligent carbon source enrichment and hydrolysis device and its operation method to address the problem that variations in influent flow rate and hydrolysis time in low C / N wastewater can affect the carbon source enrichment concentration, leading to the enriched carbon source failing to meet the requirements of subsequent biochemical treatment. This invention aims to enrich carbon sources in low C / N wastewater and hydrolyze the enriched macromolecular organic carbon sources into smaller organic carbon sources, thereby improving the biodegradability of the wastewater and providing a high-quality carbon source for subsequent denitrification.

[0005] The technical solution of this invention is implemented as follows:

[0006] An intelligent carbon source enrichment and hydrolysis device includes:

[0007] The rapid reaction tank is equipped with a main inlet pipe for sewage, a reagent dosing pipe for adding flocculant, a stirrer for mixing flocculant and sewage evenly, and an intelligent control module.

[0008] A carbon source enrichment hydrolysis tank is provided, which is connected to the outlet of the rapid reaction tank. An outlet component is provided at the bottom of the side wall of the carbon source enrichment hydrolysis tank. The tank consists of a filter media expansion zone, a filter layer zone, and a water distribution chamber from top to bottom. The filter layer zone and the water distribution chamber are separated. The filter layer zone is filled with packing material, and a biofilm is attached to the packing material. Large molecular organic matter and organic particles in the wastewater are intercepted by the biofilm in the filter layer zone and anaerobically hydrolyzed into small molecular organic carbon sources. At the same time, the detached biofilm releases organic matter with degradable or easily degradable characteristics through anaerobic digestion, which is collected and utilized as a carbon source.

[0009] A backwashing device is installed on the carbon source enrichment hydrolysis tank to allow wastewater in the filter media expansion zone to enter the water distribution chamber and filter layer zone, so as to fully mix the hydrolyzed small molecule organic matter on the biofilm with the wastewater.

[0010] To further optimize the technical solution, the backwashing device includes a backwashing pipe that connects the filter media expansion zone and the water distribution chamber. A backwashing mixing pump is installed on the backwashing pipe. A backwashing inlet valve is installed on the backwashing pipe near the filter media expansion zone, and a backwashing outlet valve is installed on the backwashing pipe near the water distribution chamber. A filter head is installed at the inlet of the backwashing pipe located in the filter media expansion zone.

[0011] The technical solution has been further optimized, with the backwashing time of the backwashing device being 10-20 minutes and the backwashing intensity being 10-20 L / (m²). 2 ·s), adopting an intermittent flushing mode, backwashing is performed once every 2 hours.

[0012] To further optimize the technical solution, the flocculant added through the reagent dosing pipe is one or more of ferrous sulfate, polyaluminum chloride, and aluminum sulfate.

[0013] The technical solution is further optimized. The intelligent control module includes a flow meter, a regulating valve, a hydrolysis time regulator, and a PLC module. The intelligent control module is used to interlock the C / N data of the wastewater influent online monitoring with the COD and TN online monitoring data of the subsequent biochemical system effluent, and adjust the influent flow and hydrolysis time of the carbon source enrichment hydrolysis device according to different water quality conditions.

[0014] The technical solution was further optimized, with the carbon source enrichment hydrolysis tank operating at a temperature of 10-40℃, a pH of 6.0-9.0, and an anaerobic hydrolysis time of 6-10h.

[0015] To further optimize the technical solution, the top sealing cover of the carbon source enrichment hydrolysis tank is provided to ensure that the inside of the carbon source enrichment hydrolysis tank is anaerobic, and an exhaust hole is provided on the top cover.

[0016] The technical solution has been further optimized. The filter layer area consists of a sparse packing area, an intermediate packing area, and a dense packing area from top to bottom. The packing material is made of hollow glass cenospheres wrapped with ceramic granules.

[0017] To further optimize the technical solution, the particle size of the filler in the sparse filler region is 2.5-4.0 cm, and the specific gravity of the filler is 1.02-1.15 g / cm³. 3 Specific surface area is 2-4.5 m² 2 / g; the filler particle size in the intermediate filler zone is 1.5-2.5cm, and the filler specific gravity is 1.15-1.25g / cm³. 3 Its specific surface area is 4.5-6.5 m². 2 / g; the particle size of the packing in the dense packing zone is 0.5-1.5cm, and the specific gravity of the packing is 1.25-1.4g / cm³. 3 Specific surface area is 6.5-8m² 2 / g;

[0018] The density of the ceramsite filter media is 2-3 g / cm³. 3 The hollow glass float beads have a particle size of 0.1-0.8 mm and a bulk density of 0.2-0.6 g / cm³. 3 The mass ratio of hollow glass float beads to ceramic filter media is 1:2-1:10.

[0019] An operating method for an intelligent carbon source enrichment and hydrolysis device includes the following steps:

[0020] S1. Wastewater flows into the rapid reaction tank through the main inlet pipe, and flocculant is added after the agent outlet is submerged, while the mixture is stirred rapidly.

[0021] S2. After being mixed evenly, the wastewater enters the carbon source enrichment and hydrolysis tank. The large molecular organic matter and organic particles in the wastewater are intercepted by the biofilm in the filter layer and anaerobically hydrolyzed into small molecular organic matter. At the same time, the detached biofilm releases organic matter with degradable or easily degradable characteristics through anaerobic digestion, which is further hydrolyzed into small molecules and anaerobic hydrolysis is carried out for a period of time.

[0022] S3. Backwashing is performed during the biofilm hydrolysis process in step S2. Wastewater in the filter media expansion zone enters the water distribution chamber and filter layer zone through the backwashing device. The small molecule organic matter hydrolyzed on the biofilm is fully mixed with the wastewater.

[0023] S4. Wastewater flows out through the effluent assembly.

[0024] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0025] 1. This invention provides an intelligent carbon source enrichment and hydrolysis device suitable for pretreatment of low C / N wastewater with a high proportion of macromolecular organic matter, effectively improving the overall denitrification effect. Based on biofilm technology, this invention achieves efficient carbon source enrichment and optimized denitrification of low C / N wastewater. The combination of packing material and biofilm effectively enriches organic matter in the wastewater. Simultaneously, the hydrolyzed small-molecule organic carbon source can serve as a supplementary carbon source for low C / N wastewater, fully utilizing the carbon sources from both wastewater and biofilm sludge. Utilizing water flow disturbance to cause the packing material to rub and collide with each other under hydraulic shear force allows aging biofilm to naturally detach and renew, continuously maintaining biofilm activity and enhancing the effectiveness and stability of microbial activity.

[0026] This invention is the first to apply biofilm technology to the enrichment and hydrolysis of carbon sources in low C / N wastewater. Through natural sedimentation filtration, the organic matter in the wastewater is brought into full contact with the biofilm, significantly improving anaerobic hydrolysis efficiency. After backwashing, the carbon source concentration in the wastewater can be concentrated to more than ten times that of the raw water, increasing the C / N ratio from 2-4 to 15-25, and the BOD / COD ratio from the initial 0.3-0.4 to 0.6-0.7. This helps provide a high-quality carbon source for the subsequent denitrification stage, achieving low-carbon and efficient wastewater treatment.

[0027] 2. This invention provides an intelligent carbon source enrichment hydrolysis device. By monitoring the C / N ratio of the influent to the hydrolysis tank and the COD and TN data of the effluent from the biological treatment tank online, and by adding an intelligent linkage mechanism between the biological treatment tank and the hydrolysis tank, the device can adjust the influent flow rate and hydrolysis time in real time, achieving efficient carbon source enrichment and control. The device can ensure stable and compliant treatment results while operating with low energy consumption. The intelligent control module receives the C / N ratio data of the raw water influent online and the COD and TN data of the subsequent biological treatment system effluent and compares them with preset values ​​to adjust the influent flow rate and hydrolysis time of the carbon source enrichment hydrolysis device, achieving precise enrichment and improving carbon source utilization efficiency.

[0028] 3. The present invention provides an intelligent carbon source enrichment and hydrolysis device. The filter media layer of the carbon source enrichment and hydrolysis tank adopts a three-layer distribution with a sparse upper layer and a dense lower layer. The particle size and specific gravity range of the filter media in different layers are different. The upper layer has larger particle size and lighter specific gravity, while the lower layer has smaller particle size and heavier specific gravity, which helps to achieve graded filtration and biofilm formation of different functional microorganisms. In addition, the biological communities growing on the surface of filter media with different particle sizes also have certain differences. The microbial community of the upper filter media is mainly composed of anaerobic hydrolytic bacteria and denitrifying and phosphorus-removing functional bacteria such as Proteobacteria and Bacteroidetes. The middle layer is mainly composed of hydrolytic acidifying bacteria of Proteobacteria and Firmicutes. The lower layer is mainly composed of acidifying bacteria such as Chlorophyta and Tauella.

[0029] 4. The present invention provides an intelligent carbon source enrichment and hydrolysis device. The packing material of the carbon source enrichment and hydrolysis tank is hollow glass beads wrapped in ceramsite filter media. The surface is rough and easy to attach biofilm. It has a large specific surface area, which is suitable for the rapid growth and reproduction of microorganisms and is easy to backwash. During backwashing, the filter layer expansion rate can reach 60%-80%. After backwashing, the detached biofilm releases organic matter with degradable or easily degradable characteristics through anaerobic digestion. It is further hydrolyzed into small molecule organic matter, which is fully mixed with sewage, realizing the dual utilization of carbon source of original sewage and carbon source of biofilm. After backwashing, the filter layer returns to its original state. Due to the difference in particle size and specific gravity of the packing material, the filter layer basically maintains the original stratification.

[0030] 5. This invention provides an intelligent carbon source enrichment and hydrolysis device. Filter heads are installed at the backwash inlet and below the filter layer of the carbon source enrichment and hydrolysis tank to prevent fine particles and packing material from entering the backwash pipe and water distribution chamber. Backwashing employs an intermittent flushing mode, which promotes uniform mixing of sludge and raw water, and facilitates the alternation of the biofilm on the filter media surface, improving hydrolysis efficiency and releasing the carbon source into the aqueous phase, allowing the filter heads to collect carbon-rich wastewater. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a top view of an intelligent carbon source enrichment and hydrolysis device according to the present invention;

[0033] Figure 2 This is a cross-sectional view of an intelligent carbon source enrichment and hydrolysis device according to the present invention;

[0034] Figure 3 This is a schematic diagram of the packing material in an intelligent carbon source enrichment and hydrolysis device of the present invention.

[0035] The components include: 1. Main inlet pipe, 2. Chemical dosing pipe, 3. Rapid reaction tank, 4. Agitator, 5. Inlet branch pipe, 6. Filter media expansion zone, 7. Filter layer zone, 8. Water distribution chamber, 9. Outlet branch pipe, 10. Top cover, 11. Backwash mixing pump, 12. Inlet control valve, 13. Backwash inlet valve, 14. Backwash outlet valve, 15. Outlet control valve, 16. Vent, 17. Ceramsite filter media, 18. Glass float beads, 19. Carbon source enrichment hydrolysis tank, and 20. Intelligent control module. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1

[0038] An intelligent carbon source enrichment and hydrolysis device, combined with Figures 1 to 2 As shown, it includes a rapid reaction tank 3, a carbon source enrichment hydrolysis tank 19, and a backwashing device.

[0039] The rapid reaction tank 3 is equipped with an inlet main pipe 1 for entering the sewage, a reagent dosing pipe 2 for adding flocculant, a stirrer for mixing the flocculant and sewage evenly, and an intelligent control module 20.

[0040] The carbon source enrichment hydrolysis tank 19 is connected to the outlet of the rapid reaction tank 3, and an outlet assembly is installed at the bottom of the side wall of the carbon source enrichment hydrolysis tank 19. The carbon source enrichment hydrolysis tank 19 consists of, from top to bottom, a filter media expansion zone 6, a filter layer zone 7, and a water distribution chamber 8. The filter layer zone 7 and the water distribution chamber 8 are separated. The filter layer zone 7 is filled with packing material, and a biofilm is attached to the packing material. After filtration through the filter layer, large molecular organic matter and organic particles in the wastewater are intercepted by the biofilm in the filter layer zone 7 and anaerobically hydrolyzed into small molecular organic carbon sources. Simultaneously, the detached biofilm releases biodegradable or easily degradable organic matter through anaerobic digestion, which is further enriched as a carbon source for collection and utilization. This allows the hydrolyzed carbon source to be released into the liquid phase and thoroughly mixed with the backwash wastewater.

[0041] The backwashing device is installed on the carbon source enrichment hydrolysis tank 19 to allow the wastewater in the filter media expansion zone 6 to enter the water distribution chamber 8 and the filter layer zone 7, so as to fully mix the hydrolyzed small molecule organic matter on the biofilm with the wastewater.

[0042] The aforementioned intelligent carbon source enrichment and hydrolysis device is the first to apply biofilm technology to the enrichment and hydrolysis of carbon sources in low C / N wastewater. Through natural sedimentation filtration, the organic matter in the wastewater comes into full contact with the biofilm, significantly improving the anaerobic hydrolysis efficiency. After backwashing, the carbon source concentration in the wastewater can be concentrated to more than ten times that of the original water, increasing the C / N ratio from 2-4 to 15-25, and the BOD / COD ratio from the initial 0.3-0.4 to 0.6-0.7. This helps to provide a high-quality carbon source for the subsequent denitrification stage, achieving low-carbon and efficient wastewater treatment.

[0043] A chemical dosing valve is installed on the chemical dosing pipe 2, and the amount of chemical dosing is controlled by the chemical dosing valve.

[0044] A water outlet pipe is provided on the other side of the rapid reaction tank 3, namely the water inlet branch pipe 5 of the carbon source enrichment hydrolysis tank 19, and a water inlet control valve 12 is installed on the pipe.

[0045] An agitator 4 is installed on the central axis of the rapid reaction tank 3, vertically connected to the top cover plate, so that the wastewater is quickly and evenly mixed with the flocculant in the reaction tank before flowing into the carbon source enrichment hydrolysis tank 19. The agitator 4 is electrically controlled and includes a motor and agitator blades.

[0046] The carbon source enrichment hydrolysis tank 19 is connected to the rapid reaction tank 3 by a water inlet branch pipe 5, which is equipped with a water inlet control valve 12. The controlled end of the water inlet control valve 12 is connected to the output end of the intelligent control module 20.

[0047] The water outlet assembly includes a water outlet branch pipe 9 located on the other side of the water distribution chamber 8 of the carbon source enrichment hydrolysis tank 19, and a water outlet control valve 15 is installed on the water outlet branch pipe 9.

[0048] In one specific implementation, the backwashing device in this embodiment includes a backwashing pipe connecting the filter media expansion zone 6 and the water distribution chamber 8. A backwashing mixing pump 11 is installed on the backwashing pipe. A backwashing inlet valve 13 is installed on the backwashing pipe near the filter media expansion zone 6, and a backwashing outlet valve 14 is installed on the backwashing pipe near the water distribution chamber 8. A filter head is installed at the inlet of the backwashing pipe within the filter media expansion zone 6. In this embodiment, the filter head material is ABS engineering plastic, and the slit width is 0.2-0.4 mm.

[0049] As a further improved embodiment, the backwashing time of the backwashing device in this invention is 10-20 min, and the backwashing intensity is 10-20 L / (m²). 2 The backwashing process employs an intermittent flushing mode, performing backwashing every 2 hours. More specifically, the backwashing device in this embodiment uses a multi-group intermittent operation mode for the reaction tanks, with each cycle consisting of: influent (10 min) - hydrolysis (6 h) - backwashing (intermittent backwashing during hydrolysis, with 10 min backwashing every 2 h) - sedimentation (20 min) - drainage (10 min). The intermittent backwashing mode promotes uniform mixing of sludge and raw water, facilitates the alternation of biofilm on the filter media surface, improves hydrolysis efficiency, and releases carbon sources into the aqueous phase, enabling the filter head to collect carbon-rich wastewater.

[0050] As a further improved implementation, a baffle is installed between the filter layer 7 and the water distribution chamber 8 in this embodiment. Backwash filter heads are evenly arranged on the baffle to prevent small particles and packing from entering the backwash pipe and the water distribution chamber.

[0051] As a further improved implementation, the intelligent control module 20 includes a flow meter, a regulating valve, a hydrolysis time regulator, and a PLC module. The intelligent control module is used to monitor the C / N ratio of the raw water influent and the COD and TN data of the subsequent biological treatment system effluent in real time, realizing intelligent control of the system's influent flow rate and hydrolysis time. It adjusts the influent flow rate and hydrolysis time of the carbon source enrichment hydrolysis device according to different water quality conditions. The raw water influent C / N value is interlocked with the online monitoring data of COD and TN of the subsequent biological treatment system effluent, establishing an intelligent feedback mechanism. After receiving the online TN monitoring data from the subsequent biological treatment system, the PLC module compares it with the preset values ​​pre-set within the PLC module. When the effluent TN detection value is lower than the preset value, the PLC module maintains the opening of the inlet regulating valve but reduces the carbon source hydrolysis time. When the effluent TN detection value is higher than the preset value, the PLC module increases the opening of the inlet regulating valve, increasing the water flow into the carbon source enrichment hydrolysis device and extending the carbon source hydrolysis time, thus intelligently replenishing the carbon source for the subsequent biochemical system. The intelligent control module can optimize the device's influent flow, hydrolysis time, and target result—TN removal efficiency—thereby accurately and efficiently replenishing carbon, improving carbon source utilization efficiency, and saving energy and reducing consumption.

[0052] In this embodiment, the flocculant added to the reagent dosing tube 2 is one or more of ferrous sulfate, polyaluminum chloride, and aluminum sulfate, and the dosage is 50-200 mg / L.

[0053] In this embodiment, the carbon source enrichment hydrolysis tank 19 operates at a temperature of 10-40℃, a pH of 6.0-9.0, and an anaerobic hydrolysis time of 6-10h.

[0054] The carbon source enrichment hydrolysis tank 19 is square in shape. The top sealing cover of the carbon source enrichment hydrolysis tank 19 is provided with a top cover 10 to ensure that the inside of the carbon source enrichment hydrolysis tank 19 is anaerobic. An exhaust hole 16 is provided above the top cover 10.

[0055] As a further improved implementation, the filter layer 7, from top to bottom, consists of a sparse packing zone, an intermediate packing zone, and a dense packing zone, such as... Figure 3 As shown, the packing material is made of hollow glass beads 18 wrapped with ceramic granules 17, which helps to reduce the specific gravity, achieve stratification, increase the dirt-holding capacity, extend the filtration cycle, and improve the backwash expansion. The filter media particle size is set to large, medium, and small from the surface to the deep layer, respectively. The particle size of the packing material in the sparse packing area is 2.5-4.0 cm, and the specific gravity of the packing material is 1.02-1.15 g / cm³. 3 Specific surface area is 2-4.5 m² 2 / g; the filler particle size in the intermediate filler zone is 1.5-2.5cm, and the filler specific gravity is 1.15-1.25g / cm³. 3 Its specific surface area is 4.5-6.5 m². 2 / g; the particle size of the packing in the dense packing zone is 0.5-1.5cm, and the specific gravity of the packing is 1.25-1.4g / cm³. 3 Specific surface area is 6.5-8m² 2 / g. More specifically, in this embodiment, the filler particle size in the sparse filler region is 2.5cm, and the filler specific gravity is 1.15g / cm³. 3 The filler particle size in the intermediate filler zone is 1.5 cm, and the filler specific gravity is 1.25 g / cm³. 3 The particle size of the packing material in the densely packed zone is 0.5 cm, and the specific gravity of the packing material is 1.4 g / cm³. 3 The slit width of the filter head in the hydrolysis tank is 0.2 mm.

[0056] The density of ceramsite filter media 17 is 2-3 g / cm³. 3 Hollow glass cenospheres (18mm diameter, 0.1-0.8mm density, 0.2-0.6g / cm³) 3 The mass ratio of hollow glass float beads 18 to ceramic filter media 17 is 1:2-1:10.

[0057] The volume ratio of the filter media expansion zone 6, the filter layer zone 7, and the water distribution chamber 8 is 3:3:1.

[0058] This embodiment also discloses an operation method for an intelligent carbon source enrichment and hydrolysis device, including the following steps:

[0059] Wastewater flows into rapid reaction tank 3 through inlet main pipe 1. After submerging the reagent outlet, ferrous sulfate flocculant is added at a dosage of 50 mg / L, while the mixture is stirred rapidly.

[0060] After being mixed evenly, the wastewater enters the carbon source enrichment and hydrolysis tank 19 through the inlet branch pipe 5. The tank operates at a temperature of 10℃ and a pH of 6.0. Large molecular organic matter and organic particles in the wastewater are intercepted by the biofilm in the filter layer 7 and anaerobically hydrolyzed into small molecular organic carbon sources. At the same time, the detached biofilm releases organic matter with degradable or easily degradable characteristics through anaerobic digestion, which can be further collected and utilized as a carbon source. The anaerobic hydrolysis time is 6 hours.

[0061] Backwashing is performed intermittently during the hydrolysis process. Wastewater from the filter media expansion zone 6 enters the water distribution chamber 8 through the backwash mixing pump 11, and is evenly distributed and backwashed through the filter head. Backwashing is performed for 10 minutes every 2 hours, with a backwash intensity of 10 L / (m²). 2 The small organic molecules hydrolyzed on the biofilm are thoroughly mixed with the sewage, and finally the sewage flows out through the effluent branch pipe 9.

[0062] The online monitoring data of COD and TN in the treated water of the biochemical system meet the standards. The intelligent control module gradually reduces the influent flow and hydrolysis time to the critical value, thereby optimizing the influent flow, hydrolysis time and the target result - TN removal efficiency, improving carbon source utilization efficiency, and saving energy and reducing consumption.

[0063] The wastewater originated from domestic sewage in a town in southern China. The original wastewater had a COD of 100 mg / L, TN of 40 mg / L, and a C / N ratio of 2.5. Particulate matter accounted for 60% of the COD, making it a low C / N wastewater with a high proportion of macromolecular organic matter. After enrichment, the wastewater had a COD of 1500 mg / L, TN of 100 mg / L, and a C / N ratio of 15. The proportion of particulate matter COD decreased to 20%, and the carbon source enrichment factor reached 15 times.

[0064] The carbon source enrichment factor is the ratio of the COD concentration of the enriched and hydrolyzed wastewater to the COD concentration of the original wastewater.

[0065] It is advisable to transport carbon-rich wastewater into a denitrification reactor, which can improve TN removal efficiency by about 20-30%.

[0066] Example 2

[0067] Based on Example 1, the intelligent carbon source enrichment hydrolysis device in this embodiment adopts a multi-group reaction tank intermittent operation mode, and each cycle is divided into: water inlet (10 min) - hydrolysis (10 h) - backflushing (intermittent backflushing during the hydrolysis process, backflushing for 20 min every 2 h) - sedimentation (20 min) - drainage (10 min).

[0068] This embodiment discloses an operation method for an intelligent carbon source enrichment and hydrolysis device, including the following steps:

[0069] Wastewater flows into rapid reaction tank 3 through inlet main pipe 1. After submerging the reagent outlet, flocculants polyaluminum chloride and aluminum sulfate are added, with a total dosage of 200 mg / L, while the mixture is stirred rapidly.

[0070] After being mixed evenly, the wastewater enters the carbon source enrichment hydrolysis tank 19 through the inlet branch pipe 5. The tank operates at a temperature of 40℃ and a pH of 9.0. Large molecular organic matter and organic particles in the wastewater are intercepted by the biofilm in the filter layer 7 and anaerobically hydrolyzed into small molecular organic matter. At the same time, the detached biofilm releases organic matter with degradable or easily degradable properties through anaerobic digestion, which is further hydrolyzed into small molecules. The anaerobic hydrolysis time is 10 hours.

[0071] Backwashing is performed intermittently during the hydrolysis process. Wastewater from the filter media expansion zone 6 enters the water distribution chamber 8 through the backwash mixing pump 11, and is then evenly backwashed through the filter head. Backwashing is performed for 20 minutes every 2 hours, with a backwash intensity of 20 L / (m²). 2The small organic molecules hydrolyzed on the biofilm are thoroughly mixed with the wastewater, which then flows out through the effluent branch pipe 9. The online monitoring data for COD and TN in the treated effluent from the biochemical system meet the standards. The intelligent control module gradually reduces the hydrolysis time and influent flow rate to the critical value, optimizing the influent flow rate, hydrolysis time, and the target result—TN removal efficiency—to improve carbon source utilization efficiency and reduce energy consumption.

[0072] The wastewater originated from dyeing and printing wastewater in an industrial zone. The original wastewater had a COD of 150 mg / L, TN of 50 mg / L, and a C / N ratio of 3. Particulate matter accounted for 65% of the COD, making it a low C / N wastewater with a high proportion of macromolecular organic matter. After enrichment, the wastewater had a COD of 2400 mg / L, TN of 160 mg / L, and a C / N ratio of 15. The proportion of particulate matter COD decreased to 20%, and the carbon source enrichment factor reached 16 times.

[0073] The carbon source enrichment factor is the ratio of the COD of the enriched and hydrolyzed wastewater to the COD of the original wastewater.

[0074] By feeding carbon-rich wastewater into a denitrification reactor, the TN removal efficiency can be increased by approximately 25-30%.

[0075] In the carbon source enrichment hydrolysis tank 19 of this device, the filter layer 7 consists of a sparse packing zone, a medium packing zone, and a dense packing zone from top to bottom. The sparse packing zone has a packing particle size of 4.0 cm and a packing specific gravity of 1.02 g / cm³. 3 The filler particle size in the intermediate filler zone is 2.5 cm, and the filler specific gravity is 1.15 g / cm³. 3 The particle size of the packing material in the densely packed zone is 1.5 cm, and the specific gravity of the packing material is 1.25 g / cm³. 3 The slit width of the filter head in the hydrolysis tank is 0.4 mm.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An intelligent carbon source enrichment and hydrolysis device, characterized in that, include: The rapid reaction tank (3) is equipped with a main inlet pipe (1) for entering the sewage, a reagent dosing pipe (2) for adding flocculant, a stirrer for mixing the flocculant and sewage evenly, and an intelligent control module (20). A carbon source enrichment hydrolysis tank (19) is connected to the outlet of the rapid reaction tank (3). An outlet assembly is provided at the bottom of the side wall of the carbon source enrichment hydrolysis tank (19). The carbon source enrichment hydrolysis tank (19) consists of a filter media expansion zone (6), a filter layer zone (7), and a water distribution chamber (8) from top to bottom. The filter layer zone (7) and the water distribution chamber (8) are separated. The filter layer zone (7) is filled with packing material, and a biofilm is attached to the packing material. The large molecular organic matter and organic particles in the wastewater are intercepted by the biofilm in the filter layer zone (7) and anaerobically hydrolyzed into small molecular organic carbon sources. At the same time, the detached biofilm releases organic matter with degradable or easily degradable characteristics through anaerobic digestion and is collected and utilized as a carbon source. A backwashing device is installed on the carbon source enrichment hydrolysis tank (19) to allow the sewage in the filter media expansion zone (6) to enter the water distribution chamber (8) and the filter layer zone (7) so that the hydrolyzed small molecule organic matter on the biofilm is fully mixed with the sewage.

2. The intelligent carbon source enrichment and hydrolysis device according to claim 1, characterized in that, The backwashing device includes a backwashing pipe connecting the filter media expansion zone (6) and the water distribution chamber (8), a backwashing mixing pump (11) is installed on the backwashing pipe, a backwashing inlet valve (13) is installed on the backwashing pipe near the filter media expansion zone (6), and a backwashing outlet valve (14) is installed on the backwashing pipe near the water distribution chamber (8); a filter head is installed at the inlet of the backwashing pipe located in the filter media expansion zone (6).

3. The intelligent carbon source enrichment and hydrolysis device according to claim 1 or 2, characterized in that, The backwashing time of the backwashing device is 10-20 minutes, and the backwashing intensity is 10-20 L / (m). 2 ·s), adopting an intermittent flushing mode, backwashing is performed once every 2 hours.

4. The intelligent carbon source enrichment and hydrolysis device according to claim 1, characterized in that, The flocculant added by the reagent dosing tube (2) is one or more of ferrous sulfate, polyaluminum chloride, and aluminum sulfate.

5. The intelligent carbon source enrichment and hydrolysis device according to claim 1, characterized in that, The intelligent control module (20) includes a flow meter, a regulating valve, a hydrolysis time regulator, and a PLC module. The intelligent control module is used to interlock the C / N data of the wastewater influent online monitoring with the COD and TN online monitoring data of the subsequent biochemical system effluent, and adjust the influent flow and hydrolysis time of the carbon source enrichment hydrolysis device according to different water quality conditions.

6. The intelligent carbon source enrichment and hydrolysis device according to claim 1, characterized in that, The carbon source enrichment hydrolysis tank (19) operates at a temperature of 10-40℃, a pH of 6.0-9.0, and an anaerobic hydrolysis time of 6-10h.

7. The intelligent carbon source enrichment and hydrolysis device according to claim 1, characterized in that, The top sealing cover of the carbon source enrichment hydrolysis tank (19) is provided with a top cover (10) to ensure that the inside of the carbon source enrichment hydrolysis tank (19) is anaerobic, and an exhaust hole (16) is provided above the top cover (10).

8. The intelligent carbon source enrichment and hydrolysis device according to claim 1, characterized in that, The filter layer (7) consists of a sparse packing area, an intermediate packing area and a dense packing area from top to bottom. The packing material is made of ceramsite filter media (17) wrapped with hollow glass beads (18).

9. The intelligent carbon source enrichment and hydrolysis device according to claim 8, characterized in that, The sparse packing region has a packing particle size of 2.5-4.0 cm and a packing specific gravity of 1.02-1.15 g / cm³. 3 Specific surface area is 2-4.5 m² 2 / g; the particle size of the filler in the intermediate packing zone is 1.5-2.5cm, and the specific gravity of the filler is 1.15-1.25g / cm³. 3 Its specific surface area is 4.5-6.5 m². 2 / g; the particle size of the packing in the dense packing zone is 0.5-1.5cm, and the specific gravity of the packing is 1.25-1.4g / cm³. 3 Specific surface area is 6.5-8m² 2 / g; The density of the ceramsite filter media (17) is 2-3 g / cm³. 3 The hollow glass float beads (18) have a particle size of 0.1-0.8 mm and a bulk density of 0.2-0.6 g / cm³. 3 The mass ratio of hollow glass float beads (18) to ceramic filter media (17) is 1:2-1:

10.

10. An operating method for an intelligent carbon source enrichment and hydrolysis device, characterized in that, The method is based on an intelligent carbon source enrichment and hydrolysis device according to any one of claims 1 to 9, and includes the following steps: S1. Wastewater flows into the rapid reaction tank (3) through the main inlet pipe (1), and flocculant is added after the agent outlet is submerged, while the mixture is stirred rapidly. S2. After being mixed evenly, the wastewater enters the carbon source enrichment hydrolysis tank (19). The large molecular organic matter and organic particles in the wastewater are intercepted by the biofilm in the filter layer (7) and anaerobically hydrolyzed into small molecular organic matter. At the same time, the detached biofilm releases organic matter with degradable or easily degradable characteristics through anaerobic digestion, which is further hydrolyzed into small molecules and anaerobic hydrolysis for a period of time. S3. Backwashing is performed during the biofilm hydrolysis process in step S2. Wastewater in the filter media expansion zone (6) enters the water distribution chamber (8) and filter layer zone (7) through the backwashing device. The small molecule organic matter hydrolyzed on the biofilm is fully mixed with the wastewater. S4. Wastewater flows out through the effluent assembly.

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